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the total surface area of the cylinder in the diagram

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the total surface area of the cylinder in the diagram [#permalink] New post   27 Aug 2022, 03:52
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Quantity A
Quantity B
the total surface area of the cylinder in the diagram
82 cm^2


A. Quantity A is greater
B. Quantity B is greater
C. The two quantities are equal
D. The relationship cannot be determined from the information given

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B
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Aleps041
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Re: the total surface area of the cylinder in the diagram [#permalink] New post   03 Sep 2022, 14:52
Can someone please explain why it says the correct answer is B?
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eltonpereira
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the total surface area of the cylinder in the diagram [#permalink] New post   Updated on: 05 Sep 2022, 10:25
1
The curved Surface area is
2 * pie * r * h = 24 * pie
For the openings or lids,
Area of two circles = 2 * pie * r^2

T.S.A = 26 * pie = 81.68 m^2

The option B might be incorrectly mentioned in cm instead of meters

Originally posted by eltonpereira on 05 Sep 2022, 09:56.
Last edited by eltonpereira on 05 Sep 2022, 10:25, edited 1 time in total.
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Re: the total surface area of the cylinder in the diagram [#permalink] New post   05 Sep 2022, 10:05
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Not sure it is wrong.

if you calculate the SA with the meters provided in the figure you will end up in decimals

81.64 cm^2 of course

B is the answer.

A little bit off but not the end of the world. Still a good question to practice
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Re: the total surface area of the cylinder in the diagram [#permalink]
05 Sep 2022, 10:05
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